Vintage Altec Lansing 21216 Throat Adaptor Included Rubber Washers L K | eBay
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They sold fast...
Me......:o
Thanks OG!
You got them cheap Alan ! :smile2:
Did I? $39 ea?Quote:
Originally Posted by Altec Best
I got them for my 802-8Gs. I thought I might like to try them with a large format horn...if I ever get one.
Kewl! Glad to help.
Yes I paid a lot more than that for mine.
Ah, I see that now. I just did a 'completed listing' search. I didn't even look, I just bought them.Quote:
Originally Posted by Altec Best
I'm going to bolt them right up to my MRII564s when I get them. It will be an interesting experiement to A/B the 802G with the 288s, all else equal. I might need hardware.
The 288s are amazing, but they are very hot. I have to keep the attenuation knob almost off on my A6s to tame them. It might work in an outdoor environment or a big auditorium where the extra HF might be needed to cut through the ambient noise, but that's not the case in my LR.
I should try increasing the crossover freq. too. Maybe running them at 800 or 1200 will take something off and give the 3156s a chance to catch up.
My adapters arrived today and I wasted no time trying them out with my 802-8Gs. I left the XO at 500Hz for the time being.
Needless to say, I had to turn the attenuator knob up from about 1 to 6, but they sound great. Not as in your face as the 288s and I'm thinking a bit more extended on the top end. I think I'll let my ears burn in for a while...
http://www.hostboard.com/forums/hbmc...2013/03/55.jpg
To be fair you should build fixed pad for the 288's to try to get the L-pad somewhere in the middle of it's range with the 288's.Quote:
Originally Posted by alancohen
To balance a passive system i like to start with the HF way low and bring it up slowly to more or less a point of balance. It sounds like the L-pad is hugging an extreme to get the 288's close to their balance point which is gonna make it pretty hard to make a fair assessment.
You would think that on packaged "system" like this A6, the "pad" should be built in to the crossover. It's not like I'm mixing components. This system was sold this way. Like I mentioned, the only think I can think of is that it was meant for an environment where a lot of ambient noise was expected and the HF is hot to overcome this. I'm sure it was not meant for a small room like my living room where someone would be sitting 9' away.Quote:
Originally Posted by bowtie427ss
The 802s seem a bit mellower in the mids, well more than a bit, and more extended in the highs. To be honest, at first blush I don't feel like I'm missing anything. That surprised me. I might measure them, then again I might not. I tend to prefer measuring with my ears. I have several 'reference' songs that tell me what I need to know. And a major factor for me is whether the music pulls me in, or pushes me away, especially after a longer session. First impression is that I could listen to these all day.
Part of what I think it might be is with the 288s I can here the horn itself. I can hear the fiberglass resonate as certain points. The 802s don't seem to 'ring the bell' as much. I wish I could try them with a different horn, but this is all I have at the moment.
I think you're probably spot on.Quote:
You would think that on packaged "system" like this A6, the "pad" should be built in to the crossover. It's not like I'm mixing components. This system was sold this way. Like I mentioned, the only think I can think of is that it was meant for an environment where a lot of ambient noise was expected and the HF is hot to overcome this. I'm sure it was not meant for a small room like my living room where someone would be sitting 9' away.
The 288 produces far more acoustic energy. Most of the horns designed to be used on the 288 had significant damping. Seems logical that some of the fiberglass horns might benefit from the application of some type of damping as well.Quote:
The 802s seem a bit mellower in the mids, well more than a bit, and more extended in the highs. To be honest, at first blush I don't feel like I'm missing anything. That surprised me. I might measure them, then again I might not. I tend to prefer measuring with my ears. I have several 'reference' songs that tell me what I need to know. And a major factor for me is whether the music pulls me in, or pushes me away, especially after a longer session. First impression is that I could listen to these all day.
Part of what I think it might be is with the 288s I can here the horn itself. I can hear the fiberglass resonate as certain points. The 802s don't seem to 'ring the bell' as much. I wish I could try them with a different horn, but this is all I have at the moment.
I recently had to return the 288C's i had been loaned so my listening comparisons are pretty limited at this point. But, your listening impressions seem to more or less mirror mine where the drivers are concerned, and would further seem to support the upward shifted response(GM and OG been tellin us this for a while;)) of the small format tangerine drivers.
And of course this now begs the question: should I be switching the XO from 500Hz to 800?Quote:
Originally Posted by bowtie427ss
http://www.hostboard.com/forums/hbmc...2013/03/56.jpg
I tried it briefly on one speaker and the difference did not jump out at me so I put it back. I wanted to keep listening with all else equal except the drivers for a while. By the weekend I will try 1200Hz for the opposite extreme and again listen for a while. This N1285 XO is pretty handy. Not sure quite what's in the box though.
I can't remember which thread, but i asked about this not too long ago and AB posted a great pic of a naked 1285 XO. Hopefully, he'll see this and know just what to do.:DQuote:
Not sure quite what's in the box though.
i was noticing that the horn was made of fiberglass. i'm suprized it doesn't ring a lot. especialy from the LFs. it looks like they have a fair bit of undercoating on them. so getting anything to stick would be a challenge. the next thing would be an enclosure. there is a composite called coosa that is very dense. but it would need to be incorporated into the layup. if i had a plug i'd have a pair or ten made up.Quote:
Originally Posted by alancohen
That's just the raw side of the fiberglass painted factory gray. Should be easy to get adhesion, and you need to be careful about getting splinters.Quote:
it looks like they have a fair bit of undercoating on them.
i sure know those splinters. :) what do most of the guys use to deaden them with?Quote:
Originally Posted by bowtie427ss
No doubt about it. They call them "large format" for a reason. One thing that I've read about is to simply swap out the diaphragms for the higher impedance type to help balance out a "hot horn"...If it's really overwhelming your LF, you can do both (switch to a 16 or 32 ohm fram and employ an L-Pad to attenuate the level).Quote:
Originally Posted by alancohen
Funny you should bring that up. I'm getting these new 300B monoblock amps soon. Supposedly they delivery a steady state 1.5W into 8 Ohms. I was planning on trying them with my 604s, which are 16. In my limited electronics mind, I was concerned that I would get less power because the impedence is higher. But in reality I would get 50% more power into a 16 Ohm speaker according to the designer. This makes sense since the higher the resistance, the greater the voltage drop across it.Quote:
Originally Posted by Alien_Shore
So, by replacing the 8 Ohm phragm with a 16, would that actually help the issue, or hurt it?
Quote:
Originally Posted by bowtie427ss
The problem is the 288's are a lot more efficient so that is why they play a lot louder than the woofers.. You can try a 30904/30923 attenuator board... I have both the 30923 and the 30904 that i just got recently. They are used for matching less efficient woofers to higher efficiency Compression drivers.Quote:
Originally Posted by alancohen
http://www.hostboard.com/forums/hbmc...2013/03/58.jpg
Altec 1285-8B Crossovers by Altec Best, on Flickr
http://www.hostboard.com/forums/hbmc...2013/03/59.jpg
Altec 1285-8B Crossovers by Altec Best, on Flickr
http://www.hostboard.com/forums/hbmc...2013/03/60.jpg
Altec 30923 Attenuators by Altec Best, on Flickr
http://www.hostboard.com/forums/hbmc...2013/03/61.jpg
HPIM3065 by Altec Best, on Flickr
http://www.hostboard.com/forums/hbmc...2013/03/62.jpg
HPIM3066 by Altec Best, on Flickr
http://www.hostboard.com/forums/hbmc...2013/03/63.jpg
Altec3090430923 by Art J., on Flickr
I think I still have mine from the Heathkit project. I will try them.
But those 802s are sounding pretty sweet right now.